diplodocus.org Git - nmh/blob - uip/show.c

   1
   2 /*
   3  * show.c -- show/list messages
   4  *
   5  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   6  * COPYRIGHT file in the root directory of the nmh distribution for
   7  * complete copyright information.
   8  */
   9
  10 #include <h/mh.h>
  11 #include <h/mime.h>
  12 #include <h/utils.h>
  13
  14 #define SHOW_SWITCHES \
  15     X("checkmime", 0, CHECKMIMESW) \
  16     X("nocheckmime", 0, NOCHECKMIMESW) \
  17     X("header", 0, HEADSW) \
  18     X("noheader", 0, NHEADSW) \
  19     X("form formfile", 0, FORMSW) \
  20     X("moreproc program", 0, PROGSW) \
  21     X("nomoreproc", 0, NPROGSW) \
  22     X("length lines", 0, LENSW) \
  23     X("width columns", 0, WIDTHSW) \
  24     X("showproc program", 0, SHOWSW) \
  25     X("showmimeproc program", 0, SHOWMIMESW) \
  26     X("noshowproc", 0, NSHOWSW) \
  27     X("draft", 0, DRFTSW) \
  28     X("file file", -4, FILESW) /* interface from showfile */ \
  29     X("fmtproc program", 0, FMTPROCSW) \
  30     X("nofmtproc", 0, NFMTPROCSW) \
  31     X("version", 0, VERSIONSW) \
  32     X("help", 0, HELPSW) \
  33
  34 #define X(sw, minchars, id) id,
  35 DEFINE_SWITCH_ENUM(SHOW);
  36 #undef X
  37
  38 #define X(sw, minchars, id) { sw, minchars, id },
  39 DEFINE_SWITCH_ARRAY(SHOW, switches);
  40 #undef X
  41
  42 /*
  43  * static prototypes
  44  */
  45 static int is_nontext(char *);
  46
  47 #define SHOW  0
  48 #define NEXT  1
  49 #define PREV  2
  50
  51
  52 int
  53 main (int argc, char **argv)
  54 {
  55     int draftsw = 0, headersw = 1;
  56     int nshow = 0, checkmime = 1, mime;
  57     int isdf = 0, mode = SHOW, msgnum;
  58     char *cp, *maildir, *file = NULL, *folder = NULL, *proc, *program;
  59     char buf[BUFSIZ], **argp, **arguments;
  60     struct msgs *mp = NULL;
  61     struct msgs_array msgs = { 0, 0, NULL };
  62     struct msgs_array vec = { 0, 0, NULL };
  63
  64 #ifdef LOCALE
  65     setlocale(LC_ALL, "");
  66 #endif
  67     invo_name = r1bindex (argv[0], '/');
  68
  69     /* read user profile/context */
  70     context_read();
  71
  72     if (!strcasecmp (invo_name, "next")) {
  73         mode = NEXT;
  74     } else if (!strcasecmp (invo_name, "prev")) {
  75         mode = PREV;
  76     }
  77     arguments = getarguments (invo_name, argc, argv, 1);
  78     argp = arguments;
  79
  80     while ((cp = *argp++)) {
  81         if (*cp == '-') {
  82             switch (smatch (++cp, switches)) {
  83                 case AMBIGSW:
  84                     ambigsw (cp, switches);
  85                     done (1);
  86                 case UNKWNSW:
  87                 case NPROGSW:
  88                 case NFMTPROCSW:
  89                     app_msgarg(&vec, --cp);
  90                     continue;
  91
  92                 case HELPSW:
  93                     snprintf (buf, sizeof(buf),
  94                         "%s [+folder] %s[switches] [switches for showproc]",
  95                         invo_name, mode == SHOW ? "[msgs] ": "");
  96                     print_help (buf, switches, 1);
  97                     done (0);
  98                 case VERSIONSW:
  99                     print_version(invo_name);
 100                     done (0);
 101
 102                 case DRFTSW:
 103                     if (file)
 104                         adios (NULL, "only one file at a time!");
 105                     draftsw++;
 106                     if (mode == SHOW)
 107                         continue;
 108 usage:
 109                     adios (NULL,
 110                             "usage: %s [+folder] [switches] [switches for showproc]",
 111                             invo_name);
 112                 case FILESW:
 113                     if (mode != SHOW)
 114                         goto usage;
 115                     if (draftsw || file)
 116                         adios (NULL, "only one file at a time!");
 117                     if (!(cp = *argp++) || *cp == '-')
 118                         adios (NULL, "missing argument to %s", argp[-2]);
 119                     file = path (cp, TFILE);
 120                     continue;
 121
 122                 case HEADSW:
 123                     headersw++;
 124                     continue;
 125                 case NHEADSW:
 126                     headersw = 0;
 127                     continue;
 128
 129                 case FORMSW:
 130                     app_msgarg(&vec, --cp);
 131                     if (!(cp = *argp++) || *cp == '-')
 132                         adios (NULL, "missing argument to %s", argp[-2]);
 133                     app_msgarg(&vec, getcpy (etcpath(cp)));
 134                     continue;
 135
 136                 case PROGSW:
 137                 case LENSW:
 138                 case WIDTHSW:
 139                 case FMTPROCSW:
 140                     app_msgarg(&vec, --cp);
 141                     if (!(cp = *argp++) || *cp == '-')
 142                         adios (NULL, "missing argument to %s", argp[-2]);
 143                     app_msgarg(&vec, cp);
 144                     continue;
 145
 146                 case SHOWSW:
 147                     if (!(showproc = *argp++) || *showproc == '-')
 148                         adios (NULL, "missing argument to %s", argp[-2]);
 149                     nshow = 0;
 150                     continue;
 151                 case NSHOWSW:
 152                     nshow++;
 153                     continue;
 154
 155                 case SHOWMIMESW:
 156                     if (!(showmimeproc = *argp++) || *showmimeproc == '-')
 157                         adios (NULL, "missing argument to %s", argp[-2]);
 158                     nshow = 0;
 159                     continue;
 160                 case CHECKMIMESW:
 161                     checkmime++;
 162                     continue;
 163                 case NOCHECKMIMESW:
 164                     checkmime = 0;
 165                     continue;
 166             }
 167         }
 168         if (*cp == '+' || *cp == '@') {
 169             if (folder)
 170                 adios (NULL, "only one folder at a time!");
 171             else
 172                 folder = pluspath (cp);
 173         } else {
 174             if (mode != SHOW)
 175                 goto usage;
 176             else
 177                 app_msgarg(&msgs, cp);
 178         }
 179     }
 180
 181     if (!context_find ("path"))
 182         free (path ("./", TFOLDER));
 183
 184     if (draftsw || file) {
 185         if (msgs.size)
 186             adios (NULL, "only one file at a time!");
 187         if (draftsw)
 188             app_msgarg(&vec, getcpy (m_draft (folder, NULL, 1, &isdf)));
 189         else
 190             app_msgarg(&vec, file);
 191         goto go_to_it;
 192     }
 193
 194     if (!msgs.size) {
 195         switch (mode) {
 196             case NEXT:
 197                 app_msgarg(&msgs, "next");
 198                 break;
 199             case PREV:
 200                 app_msgarg(&msgs, "prev");
 201                 break;
 202             default:
 203                 app_msgarg(&msgs, "cur");
 204                 break;
 205         }
 206     }
 207
 208     if (!folder)
 209         folder = getfolder (1);
 210     maildir = m_maildir (folder);
 211
 212     if (chdir (maildir) == NOTOK)
 213         adios (maildir, "unable to change directory to");
 214
 215     /* read folder and create message structure */
 216     if (!(mp = folder_read (folder, 1)))
 217         adios (NULL, "unable to read folder %s", folder);
 218
 219     /* check for empty folder */
 220     if (mp->nummsg == 0)
 221         adios (NULL, "no messages in %s", folder);
 222
 223     /* parse all the message ranges/sequences and set SELECTED */
 224     for (msgnum = 0; msgnum < msgs.size; msgnum++)
 225         if (!m_convert (mp, msgs.msgs[msgnum]))
 226             done (1);
 227
 228     /*
 229      * Set the SELECT_UNSEEN bit for all the SELECTED messages,
 230      * since we will use that as a tag to know which messages
 231      * to remove from the "unseen" sequence.
 232      */
 233     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 234         if (is_selected(mp, msgnum))
 235             set_unseen (mp, msgnum);
 236
 237     seq_setprev (mp);           /* set the Previous-Sequence */
 238     seq_setunseen (mp, 1);      /* unset the Unseen-Sequence */
 239
 240     for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 241         if (is_selected(mp, msgnum))
 242             app_msgarg(&vec, getcpy (m_name (msgnum)));
 243
 244     seq_setcur (mp, mp->hghsel);        /* update current message  */
 245     seq_save (mp);                      /* synchronize sequences   */
 246     context_replace (pfolder, folder);  /* update current folder   */
 247     context_save ();                    /* save the context file   */
 248
 249     if (headersw && vec.size == 1)
 250         printf ("(Message %s:%s)\n", folder, vec.msgs[0]);
 251
 252 go_to_it: ;
 253     fflush (stdout);
 254
 255     /*
 256      * Decide which "proc" to use
 257      */
 258     mime = 0;
 259     if (nshow) {
 260         proc = catproc;
 261     } else {
 262         /* check if any messages are non-text MIME messages */
 263         if (checkmime) {
 264             if (!draftsw && !file) {
 265                 /* loop through selected messages and check for MIME */
 266                 for (msgnum = mp->lowsel; msgnum <= mp->hghsel; msgnum++)
 267                     if (is_selected (mp, msgnum) && is_nontext (m_name (msgnum))) {
 268                         mime = 1;
 269                         break;
 270                     }
 271             } else {
 272                 /* check the file or draft for MIME */
 273                 if (is_nontext (vec.msgs[vec.size - 1]))
 274                     mime = 1;
 275             }
 276         }
 277
 278         /* Set the "proc" */
 279         if (mime)
 280             proc = showmimeproc;
 281         else
 282             proc = showproc;
 283     }
 284
 285     if (folder && !draftsw && !file)
 286         m_putenv ("mhfolder", folder);
 287
 288     if (strcmp (r1bindex (proc, '/'), "mhn") == 0) {
 289         /* Add "-file" if showing file or draft, */
 290         if (draftsw || file) {
 291             app_msgarg(&vec, vec.msgs[vec.size - 1]);
 292             vec.msgs[vec.size - 2] = "-file";
 293         }
 294         /* and add -show for backward compatibility */
 295         app_msgarg(&vec, "-show");
 296     } else if (strcmp (r1bindex (proc, '/'), "mhshow") == 0) {
 297         /* If "mhshow", add "-file" if showing file or draft. */
 298         if (draftsw || file) {
 299             app_msgarg(&vec, vec.msgs[vec.size - 1]);
 300             vec.msgs[vec.size - 2] = "-file";
 301         }
 302     } else if (strcmp (r1bindex (proc, '/'), "mhl") == 0) {
 303         /* If "mhl", then run it internally */
 304         argsplit_insert(&vec, "mhl", &program);
 305         app_msgarg(&vec, NULL);
 306         mhl (vec.size, vec.msgs);
 307         done (0);
 308     }
 309
 310     argsplit_insert(&vec, proc, &program);
 311     app_msgarg(&vec, NULL);
 312     execvp (program, vec.msgs);
 313     adios (proc, "unable to exec");
 314     return 0;  /* dead code to satisfy the compiler */
 315 }
 316
 317
 318 /*
 319  * Check if a message or file contains any non-text parts
 320  */
 321 static int
 322 is_nontext (char *msgnam)
 323 {
 324     int result, state;
 325     char *bp, *dp, *cp;
 326     char buf[BUFSIZ], name[NAMESZ];
 327     FILE *fp;
 328     m_getfld_state_t gstate = 0;
 329
 330     if ((fp = fopen (msgnam, "r")) == NULL)
 331         return 0;
 332
 333     for (;;) {
 334         int bufsz = sizeof buf;
 335         switch (state = m_getfld (&gstate, name, buf, &bufsz, fp)) {
 336         case FLD:
 337         case FLDPLUS:
 338             /*
 339              * Check Content-Type field
 340              */
 341             if (!strcasecmp (name, TYPE_FIELD)) {
 342                 int passno;
 343                 char c;
 344
 345                 cp = add (buf, NULL);
 346                 while (state == FLDPLUS) {
 347                     bufsz = sizeof buf;
 348                     state = m_getfld (&gstate, name, buf, &bufsz, fp);
 349                     cp = add (buf, cp);
 350                 }
 351                 bp = cp;
 352                 passno = 1;
 353
 354 again:
 355                 for (; isspace ((unsigned char) *bp); bp++)
 356                     continue;
 357                 if (*bp == '(') {
 358                     int i;
 359
 360                     for (bp++, i = 0;;) {
 361                         switch (*bp++) {
 362                         case '\0':
 363 invalid:
 364                             result = 0;
 365                             goto out;
 366                         case '\\':
 367                             if (*bp++ == '\0')
 368                                 goto invalid;
 369                             continue;
 370                         case '(':
 371                             i++;
 372                             /* and fall... */
 373                         default:
 374                             continue;
 375                         case ')':
 376                             if (--i < 0)
 377                                 break;
 378                             continue;
 379                         }
 380                         break;
 381                     }
 382                 }
 383                 if (passno == 2) {
 384                     if (*bp != '/')
 385                         goto invalid;
 386                     bp++;
 387                     passno = 3;
 388                     goto again;
 389                 }
 390                 for (dp = bp; istoken (*dp); dp++)
 391                     continue;
 392                 c = *dp;
 393                 *dp = '\0';
 394                 if (!*bp)
 395                     goto invalid;
 396                 if (passno > 1) {
 397                     if ((result = (strcasecmp (bp, "plain") != 0)))
 398                         goto out;
 399                     *dp = c;
 400                     for (dp++; isspace ((unsigned char) *dp); dp++)
 401                         continue;
 402                     if (*dp) {
 403                         if ((result = !uprf (dp, "charset")))
 404                             goto out;
 405                         dp += sizeof("charset") - 1;
 406                         while (isspace ((unsigned char) *dp))
 407                             dp++;
 408                         if (*dp++ != '=')
 409                             goto invalid;
 410                         while (isspace ((unsigned char) *dp))
 411                             dp++;
 412                         if (*dp == '"') {
 413                             if ((bp = strchr(++dp, '"')))
 414                                 *bp = '\0';
 415                         } else {
 416                             for (bp = dp; *bp; bp++)
 417                                 if (!istoken (*bp)) {
 418                                     *bp = '\0';
 419                                     break;
 420                                 }
 421                         }
 422                     } else {
 423                         /* Default character set */
 424                         dp = "US-ASCII";
 425                     }
 426                     /* Check the character set */
 427                     result = !check_charset (dp, strlen (dp));
 428                 } else {
 429                     if (!(result = (strcasecmp (bp, "text") != 0))) {
 430                         *dp = c;
 431                         bp = dp;
 432                         passno = 2;
 433                         goto again;
 434                     }
 435                 }
 436 out:
 437                 free (cp);
 438                 if (result) {
 439                     fclose (fp);
 440                     m_getfld_state_destroy (&gstate);
 441                     return result;
 442                 }
 443                 break;
 444             }
 445
 446             /*
 447              * Check Content-Transfer-Encoding field
 448              */
 449             if (!strcasecmp (name, ENCODING_FIELD)) {
 450                 cp = add (buf, NULL);
 451                 while (state == FLDPLUS) {
 452                     bufsz = sizeof buf;
 453                     state = m_getfld (&gstate, name, buf, &bufsz, fp);
 454                     cp = add (buf, cp);
 455                 }
 456                 for (bp = cp; isspace ((unsigned char) *bp); bp++)
 457                     continue;
 458                 for (dp = bp; istoken ((unsigned char) *dp); dp++)
 459                     continue;
 460                 *dp = '\0';
 461                 result = (strcasecmp (bp, "7bit")
 462                        && strcasecmp (bp, "8bit")
 463                        && strcasecmp (bp, "binary"));
 464
 465                 free (cp);
 466                 if (result) {
 467                     fclose (fp);
 468                     m_getfld_state_destroy (&gstate);
 469                     return result;
 470                 }
 471                 break;
 472             }
 473
 474             /*
 475              * Just skip the rest of this header
 476              * field and go to next one.
 477              */
 478             while (state == FLDPLUS) {
 479                 bufsz = sizeof buf;
 480                 state = m_getfld (&gstate, name, buf, &bufsz, fp);
 481             }
 482             break;
 483
 484             /*
 485              * We've passed the message header,
 486              * so message is just text.
 487              */
 488         default:
 489             fclose (fp);
 490             m_getfld_state_destroy (&gstate);
 491             return 0;
 492         }
 493     }
 494 }